DJM A9 Mixer is very different form the DJM 900nxs2

Here's what I just found out about how the DJM A9 mixer it differs from the DJM 900nxs2 mixer

All I have hooked up to the A9 is a ethernet cable from both CDJ-3000's into a ethernet hub

and from the hub it's connected to the ethernet link port on the back A9 mixer

and the only usb connection I have going into the mixer is one usb cable going into the PC from the A9 mixers USB-A connection, all you need are these two connections form the CDJ's

all the other cables coming from the CDJ's are not needed, I found out that this connection works just fine

also there are no more drop-out from the DJM A9 if you use this method of connection.

Try this and see if this works for you, post back here with what you find.